package com.qingcheng.service.impl;
import com.alibaba.dubbo.config.annotation.Service;
import com.alibaba.fastjson.JSON;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.qingcheng.dao.SkuMapper;
import com.qingcheng.entity.PageResult;
import com.qingcheng.pojo.goods.Sku;
import com.qingcheng.pojo.order.OrderItem;
import com.qingcheng.service.goods.SkuService;
import com.qingcheng.util.CacheKey;
import org.apache.http.HttpHost;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.transaction.annotation.Transactional;
import tk.mybatis.mapper.entity.Example;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service(interfaceClass = SkuService.class)
public class SkuServiceImpl implements SkuService {

    @Autowired
    private SkuMapper skuMapper;

    /**
     * 返回全部记录
     * @return
     */
    public List<Sku> findAll() {
        return skuMapper.selectAll();
    }

    /**
     * 分页查询
     * @param page 页码
     * @param size 每页记录数
     * @return 分页结果
     */
    public PageResult<Sku> findPage(int page, int size) {
        PageHelper.startPage(page,size);
        Page<Sku> skus = (Page<Sku>) skuMapper.selectAll();
        return new PageResult<Sku>(skus.getTotal(),skus.getResult());
    }

    /**
     * 条件查询
     * @param searchMap 查询条件
     * @return
     */
    public List<Sku> findList(Map<String, Object> searchMap) {
        Example example = createExample(searchMap);
        return skuMapper.selectByExample(example);
    }

    /**
     * 分页+条件查询
     * @param searchMap
     * @param page
     * @param size
     * @return
     */
    public PageResult<Sku> findPage(Map<String, Object> searchMap, int page, int size) {
        PageHelper.startPage(page,size);
        Example example = createExample(searchMap);
        Page<Sku> skus = (Page<Sku>) skuMapper.selectByExample(example);
        return new PageResult<Sku>(skus.getTotal(),skus.getResult());
    }

    /**
     * 根据Id查询
     * @param id
     * @return
     */
    public Sku findById(String id) {
        return skuMapper.selectByPrimaryKey(id);
    }

    /**
     * 新增
     * @param sku
     */
    public void add(Sku sku) {
        skuMapper.insert(sku);
    }

    /**
     * 修改
     * @param sku
     */
    public void update(Sku sku) {
        skuMapper.updateByPrimaryKeySelective(sku);
    }

    /**
     *  删除
     * @param id
     */
    public void delete(String id) {
        skuMapper.deleteByPrimaryKey(id);
    }

    /**
     * 构建查询条件
     * @param searchMap
     * @return
     */
    private Example createExample(Map<String, Object> searchMap){
        Example example=new Example(Sku.class);
        Example.Criteria criteria = example.createCriteria();
        if(searchMap!=null){
            // 商品id
            if(searchMap.get("id")!=null && !"".equals(searchMap.get("id"))){
                criteria.andLike("id","%"+searchMap.get("id")+"%");
            }
            // 商品条码
            if(searchMap.get("sn")!=null && !"".equals(searchMap.get("sn"))){
                criteria.andLike("sn","%"+searchMap.get("sn")+"%");
            }
            // SKU名称
            if(searchMap.get("name")!=null && !"".equals(searchMap.get("name"))){
                criteria.andLike("name","%"+searchMap.get("name")+"%");
            }
            // 商品图片
            if(searchMap.get("image")!=null && !"".equals(searchMap.get("image"))){
                criteria.andLike("image","%"+searchMap.get("image")+"%");
            }
            // 商品图片列表
            if(searchMap.get("images")!=null && !"".equals(searchMap.get("images"))){
                criteria.andLike("images","%"+searchMap.get("images")+"%");
            }
            // SPUID
            if(searchMap.get("spuId")!=null && !"".equals(searchMap.get("spuId"))){
                criteria.andEqualTo("spuId",searchMap.get("spuId"));
            }
            // 类目名称
            if(searchMap.get("categoryName")!=null && !"".equals(searchMap.get("categoryName"))){
                criteria.andLike("categoryName","%"+searchMap.get("categoryName")+"%");
            }
            // 品牌名称
            if(searchMap.get("brandName")!=null && !"".equals(searchMap.get("brandName"))){
                criteria.andLike("brandName","%"+searchMap.get("brandName")+"%");
            }
            // 规格
            if(searchMap.get("spec")!=null && !"".equals(searchMap.get("spec"))){
                criteria.andLike("spec","%"+searchMap.get("spec")+"%");
            }
            // 商品状态 1-正常，2-下架，3-删除
            if(searchMap.get("status")!=null && !"".equals(searchMap.get("status"))){
                criteria.andLike("status","%"+searchMap.get("status")+"%");
            }

            // 价格（分）
            if(searchMap.get("price")!=null ){
                criteria.andEqualTo("price",searchMap.get("price"));
            }
            // 库存数量
            if(searchMap.get("num")!=null ){
                criteria.andEqualTo("num",searchMap.get("num"));
            }
            // 库存预警数量
            if(searchMap.get("alertNum")!=null ){
                criteria.andEqualTo("alertNum",searchMap.get("alertNum"));
            }
            // 重量（克）
            if(searchMap.get("weight")!=null ){
                criteria.andEqualTo("weight",searchMap.get("weight"));
            }
            // 类目ID
            if(searchMap.get("categoryId")!=null ){
                criteria.andEqualTo("categoryId",searchMap.get("categoryId"));
            }
            // 销量
            if(searchMap.get("saleNum")!=null ){
                criteria.andEqualTo("saleNum",searchMap.get("saleNum"));
            }
            // 评论数
            if(searchMap.get("commentNum")!=null ){
                criteria.andEqualTo("commentNum",searchMap.get("commentNum"));
            }

        }
        return example;
    }

    ///////////////////////////////////////////////////////////////////

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 保存所有价格到缓存中
     */
    public void saveAllPriceToRedis(){

        if(!redisTemplate.hasKey(CacheKey.SKU_PRICE)) { //如果缓存中有就不缓存，节约性能，因为这数据很庞大
            //查询所有价格
            Example example = new Example(Sku.class);
            Example.Criteria criteria = example.createCriteria();
            criteria.andEqualTo("status", 1);
            List<Sku> skuList = skuMapper.selectByExample(example);

            //放入到缓存中
            for (Sku sku : skuList) {
                redisTemplate.boundHashOps(CacheKey.SKU_PRICE).put(sku.getId(), sku.getPrice());
            }
        }else{
            System.out.println("已存在价格数据，没有全部加载");
        }
    }

    /**
     * 根据skuId查询价格
     * @param id
     * @return
     */
    public Integer findPriceById(String id){
        return (Integer) redisTemplate.boundHashOps(CacheKey.SKU_PRICE).get(id);
    }

    /**
     * 根据skuId 保存价格到缓存
     * @param id
     * @param price
     */
    public void savePriceToRedisById(String id,Integer price){
        redisTemplate.boundHashOps(CacheKey.SKU_PRICE).put(id,price);
    }

    /**
     * 根据skuId 删除价格缓存
     * @param skuId
     */
    public void deletePriceFromRedisById(String skuId){
        redisTemplate.boundHashOps(CacheKey.SKU_PRICE).delete(skuId);
    }



    /**
     * 上传sku到elasticsearch(全部上传，可以单独写到另外个项目中单独实行)
     */
    public void saveSkuToElasticsearch(){

        System.out.println("service:+++++++++++++++++++++++++++++++++");

        //1.连接rest接口
        HttpHost httpHost = new HttpHost("192.168.211.135",9200,"http");
//        rest构建器
        RestClientBuilder restClientBuilder = RestClient.builder(httpHost);
        //高级客户端对象
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(restClientBuilder);

        //2.封装请求对象
        BulkRequest bulkRequest = new BulkRequest();//批量请求

        List<Sku> skuList = skuMapper.selectAll();
        for(Sku sku:skuList){
//            System.out.println("id:"+sku.getId());
            IndexRequest indexRequest = new IndexRequest("sku", "doc",sku.getId());
            Map skuMap = new HashMap();
            skuMap.put("name",sku.getName());
            skuMap.put("price", sku.getPrice());
            skuMap.put("image", sku.getImage());
            Date createTime = sku.getCreateTime();
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
            String time = simpleDateFormat.format(createTime);
//            System.out.println("time:"+time);
            skuMap.put("createTime",time);
            skuMap.put("spuId",sku.getSpuId());
            skuMap.put("categoryName",sku.getCategoryName());
            skuMap.put("brandName",sku.getBrandName());
            Map spec = (Map) JSON.parseObject(sku.getSpec());
            skuMap.put("spec",spec);
            skuMap.put("saleNum", sku.getSaleNum());
            skuMap.put("commentNum", sku.getCommentNum());

            indexRequest.source(skuMap);
            bulkRequest.add(indexRequest);
        }

        //3.执行且获取响应对象
        try {
            BulkResponse responses = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
            int status = responses.status().getStatus();
            System.out.println("执行结果:"+status);

            //关闭接口
            restHighLevelClient.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Value("${elasticSearch.hostname}")
    String elasticSearchHostname;

    @Value("${elasticSearch.port}")
    String elasticSearchPort;

    /**
     * 根据商品的SpuId来上传sku到Elasticsearch 这个无效，无法在rabbitmq中使用@reference
     */
    public void saveSkuToElasticsearchBySpuId(String spuId){

        //1.连接rest接口
        HttpHost httpHost = new HttpHost(elasticSearchHostname,Integer.parseInt(elasticSearchPort),"http");
//        rest构建器
        RestClientBuilder restClientBuilder = RestClient.builder(httpHost);
        //高级客户端对象
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(restClientBuilder);

        //2.封装请求对象
        BulkRequest bulkRequest = new BulkRequest();//批量请求

        //根据spuId查询skuList ,skuServiceImpl中的createExample,要修改下andEqualTo("spuId",spuId)
        Example example = new Example(Sku.class);
        Example.Criteria criteria = example.createCriteria();
        criteria.andEqualTo("spuId",spuId);

        List<Sku> skuList = skuMapper.selectByExample(example);
        for(Sku sku:skuList){
            IndexRequest indexRequest = new IndexRequest("sku", "doc",sku.getId());
            Map skuMap = new HashMap();
            skuMap.put("name",sku.getName());
            skuMap.put("price", sku.getPrice());
            skuMap.put("image", sku.getImage());
            Date createTime = sku.getCreateTime();
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
            String time = simpleDateFormat.format(createTime);
            skuMap.put("createTime",time);
            skuMap.put("spuId",sku.getSpuId());
            skuMap.put("categoryName",sku.getCategoryName());
            skuMap.put("brandName",sku.getBrandName());
            Map spec = (Map) JSON.parseObject(sku.getSpec());
            skuMap.put("spec",spec);
            skuMap.put("saleNum", sku.getSaleNum());
            skuMap.put("commentNum", sku.getCommentNum());

            indexRequest.source(skuMap);
            bulkRequest.add(indexRequest);
        }

        //3.执行且获取响应对象
        try {
            BulkResponse responses = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
//            int status = responses.status().getStatus();
//            System.out.println("执行结果:"+status);

            //关闭接口
            restHighLevelClient.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 根据商品的SpuId来删除Elasticsearch中的sku 这个无效，无法在rabbitmq中使用@reference
     */
    public void deleteSkuToElasticsearchBySpuId(String spuId){
        //1.连接rest接口
        HttpHost httpHost = new HttpHost(elasticSearchHostname,Integer.parseInt(elasticSearchPort),"http");
        //rest构建器
        RestClientBuilder restClientBuilder = RestClient.builder(httpHost);
        //高级客户端对象
        RestHighLevelClient restHighLevelClient = new RestHighLevelClient(restClientBuilder);

        //删除请求
        DeleteRequest deleteRequest = new DeleteRequest("sku");
        deleteRequest.type("doc").id(spuId);

        //3.获取响应结果
        DeleteResponse delete = null;//执行返回结果
        try {
            delete = restHighLevelClient.delete(deleteRequest, RequestOptions.DEFAULT);
//            int status = delete.status().getStatus();
//            System.out.println(status);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    /**
     * 根据购物车批量删除sku库存
     * @param orderItemList
     * @return
     */
    @Transactional
    public boolean deductionStock(List<OrderItem> orderItemList){

        //检查是否可以扣减库存
        Boolean isDeduction=true;
        for(OrderItem orderItem : orderItemList){
            Sku sku = findById(orderItem.getSkuId());
            if(sku==null){
                isDeduction=false;
                break;
            }
            if(!sku.getStatus().equals("1")){
                isDeduction=false;
                break;
            }
            if(sku.getNum()<orderItem.getNum()){
                isDeduction=false;
                break;
            }

        }

        //扣减库存
        if(isDeduction){
            for (OrderItem orderItem:orderItemList){
                skuMapper.detectionStock(orderItem.getSkuId(),orderItem.getNum());//扣减库存
                skuMapper.addSaleNum(orderItem.getSkuId(),orderItem.getNum());//增加销量
            }
        }

        return isDeduction;
    }

}
